Usage: 4 forms in 7 verses
Form Translated As     In Verse(s)
σαββατιείτε you shall observe the Sabbath LXX.Lev.23.32
σαββατιεί it shall observe the Sabbath LXX.Lev.26.35
shall observe the Sabbath LXX.Lev.26.34
σαββατίσαι by observing the Sabbath LXX.2Chr.36.21
εσαββάτισεν observe the Sabbath LXX.Lev.26.35
observed the Sabbath LXX.Exod.16.30
to observe the Sabbath LXX.2Chr.36.21

Liddell-Scott-Jones

Σαββατίζω (Sabbatizō) to observe sabbaths G:V

Σαββατίζω-ίζω,

future -ιῶ[LXX]:—keep Sabbath,[LXX]; γῆ σ. τὰ σάββατα αὐτῆς keeps Sabbath by resting untilled,[LXX]

LSJ Scripture Refs: LXX.Exod.16.30LXX.2Chr.36.21